the following is the detail request:
for example i use meetme application, enter a conference room . i want to get a notification when another enter the conference room . the notification is not only through voice but also text message (this is what i expect ,other way is ok too). how to do this? thanks!

for example, if i get the channel string like the following :
Channel: IAX2/24002020@192.168.82.24:4569-2 .how can i use the channel string throung asterisk manager api or AGI using php script send text to softphone 24002020 ?
any hints will be appreciated!